Home / 5,140.96-7,712.70-1,678.12

Finding the Fourth Proportional to 5,140.96, 7,712.70 and 1,678.12

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Solution

The fourth proportional to 5,140.96, 7,712.70 and 1,678.12 is: 2,517.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,140.96 : 7,712.70 = 1,678.12 : x
  2. Step 2: Convert to fraction form
    5,140.96/7,712.70 = 1,678.12/x
  3. Step 3: Cross multiply
    5,140.96x = 7,712.70 × 1,678.12
  4. Step 4: Simplify right side
    5,140.96x = 12,942,836.12
  5. Step 5: Solve for x
    x = 12,942,836.12/5,140.96
  6. Step 6: Final answer
    x = 2,517.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.